<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .shield{
            width: 400px;
            height: 400px;
            border-radius: 50%;
            text-align: center;
            line-height: 400px;
            margin: 100px auto;
            background-image: radial-gradient(
                circle closest-side,
                blue 0,
                blue 50px,
                red 50px,
                red 100px,
                #fff 100px,
                #fff 150px,
                red 150px,
                red 200px
            );
            box-shadow: 0 0 5px rgba(0, 0, 0, 0.5), 0 1px 5px rgba(0, 0, 0, 0.5),
        1px 0 5px rgba(0, 0, 0, 0.5);
}
       


        .shield > span {
            
            top: 50%;
            transform: translate(-50% -50%);
            font-size: 80px;
            color: #fff;
            transform: translate(-50%,-50%);
            text-shadow: 0px 0px 5px #333, 0px 1px 5px #333, 1px 0px 5px #333,
    1px 1px 5px #333;
        }
    </style>
</head>
<body>
    <div class="shield">
        <span>★</span>
    </div>
</body>
</html>